Plate Tectonics - 4: Question Preview (ID: 13262)


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How do scientist study earth\\\'s interior?
a) direct and indirect evidence
b) deep-ocean trenches
c) outer space
d) magnetic reversals

What are the three layers of the Earth?
a) crust, mantle, core
b) mountains, astroids, Moho
c) lithosphere, asthenosphere, mantle
d) crust, Moho, core

What are seismic waves?
a) waves formed by earthquakes used to acquire evidence about earth
b) waves formed in the ocean
c) waves formed as a model
d) waves formed by several layers

The process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle is called
a) subduction
b) convection
c) radiation
d) Pangaea

Where is the lithosphere?
a) uppermost mantle
b) inner core
c) below the asthenosphere
d) continental crust

How thick is the crust?
a) 5 -70km
b) 1000 - 1216km
c) 2000 - 2266km
d) 2500 - 2,867km

What is the device used to record the echoes of the seafloor?
a) sonar
b) radar
c) radio
d) seismograph

How does sea-floor spreading help support the idea that continents drift?
a) It provides explanation of how oceanic crust and continents could move
b) It provides explanation of how convection currents form
c) It provides explanation of how magnetic reversal occurs
d) It provides explanation of how lithosphere and asthenosphere move

Where is the youngest ocean crust?
a) at the ridge center
b) farthest from the ridge
c) in the middle
d) at the continent

What three types of evidence provided support for the theory of sea-floor spreading?
a) volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
b) Pangea, indirect evidence, convection currents
c) Moho, magnetic stripes, radiation
d) convergent boundary, divergent boundary, transform boundary

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